Means for supporting core bars in flasks



March 23 1926. 1,578,083

J. R. McwANE MEANS FOR SUPPORTING CORE BARS IN FLASKS Filed Dec. 12,1924 3 Sheets-Sheet 1 March 23 192e. 1,578,083

J. "R. MCWANE MEANS FOR SUPPORTING CORE BARS IN FLASKS ATTO RNEY i u' L,u l .l yf z Mmh 23 192 .`,1f.578,083

J. R. MCWANE MEANS FOR SUPPORTING CORE BARS IN FLASKS Filed Dec. 12 ,I1924 3 Sheets-Sheet latented Mar. 23, 1926.

JAMES R. MQWANE, OF" BIRMINGHAM, ALABAMA.

MEANS FOR 4STFPIPOR'TING COREiBARS-'IN FLAS'KS.

Appli'cationled December 12, 1924. Serial No. 755,512.

To all whom t muy concern Be it known that I, JAMES R. MCVANE, a citizenof the United States, resi-ding. at Birmingham, in the county ofJefferson and State of Alabama.,` have invented a new and usefulImprovement lin Means for Supporting Core "Bars in Flashs, of which: thetolloWing is a specification. y This invention relates toY means forsupporting vcore bars in liaslrs` The; object is to provide means forrigidly supporting core bars of elongated form in flasks, such are usedin the manutacture ot' pipe or analogous castings by the horizontalmethod', wherein the flasks are placed on the molding floor inlhorizontal position for the reception of the molten metal, and whereinitis necessary that the core bar, together With the sand core there on,shalloccupyv a true concentric position in the mold throughout itslength, in order to secure a casting ot uniform thickness.

Another object is to provide means` for this purpose that shall firmlygrip the core bar beyond the ends ot the mold, and to et'- i'ectuallyprevent any sagging of the intermediate portion ot the core barand coredue to the Weightthereot, and also to prevent any rising mover-nent ofthe saine due to tne floating actionv ot the inowing inolten metal whenthe same i-s poured.y

A linal object is to provide'y means Which will accomplish the abovestated purpose vithout the necessity for using chaplets to support thecore b ar at intervals, and which are necessarily lett embedded in theWall 0I"- the casting, thevmeans herein. employed-A being designed to bereadily attachedto existing tie-slr sections, such as are in use inhorizontal pipe casting operations- Without the n cessity tor anyalterations in thesarne,

'or the invention may be readily incorporated as an integral part of neweopeand drag sections, Without interfering in any manner with thepresent functions of the saine.

l full and complete ui-ide'rstanding ot the invention may be obtainedfrom consideraL tion ot' the following detailed description, taken inconnection with the accompanying drawings forming a part of thisspecifica tion7 it being understood that While the drawings shovyvpractical 'forms of the invenftion, the latter is not to be con-fined tostrict cont-'orn'iiq7 with the showing thereof, `but maj/,he Changed ormodified', so long as such foundry and in a horizontal' position.

changes or modifications mark no material departure fromV the salientfeatures ofthe invention, as specifically' pointed vout in the appendedclaims. n i

f In the drawings, in Which `similar reference characters designatecorresponding parts throughout the several figures Figure l is alongitudinal view, illustratingidiagrammatically the princi-ple involvedink one form of the invention;

Figure 2 is a similar view ot another form;v Y

Figure 3 is a vertical longitudinal section through a double pipemolding flask used in the horizontal method ot casting and showing.r acore bar and corev supported therein by the improved means; v

Figure 4 is an enlarged end view of the same;

Figure 5 is a transverse sectional4 vieui thereof; s

Figure 6 isa plan view ot the subj ect inatter` oft. Fig. et, the upperor copev section being removed and showing the ends of the core bars, as.used in a double flask,.support-` ed in. the drag section by theimproved means g. Y

.Figure .7 is ahorizontal' section taken on the line 7 7 of Figure 5; i

Figure 8 is a detail perspective oit one ot the outer lend supports forthe core bars removed from thedrag 'section or lthe flask;

Figure 9 is. a similarview ot' one of the inner abu-tments removed fromvthe cope' sectionaof the. flask; 1 l

Figure l04 is a detail section showing. the manner of inountin-gvthe setscrews carried lby the abutments; Y

Figure ll is a detail perspectiveot one of the Wedges used in connectionwith the outer supports; s

s Figure 12 is an end vieur ot' a'simplihed form of end support s Figure13 is a detail sect-ion taken on the line 13-13 of Figure 12; i

Figure 14 is a detail perspective vievs7 of one of the members shovvn inFigure 12'; c.

Figure l5 is a partial vertical longitudinal section similar to Fig. 3,but embodying the modi'lication ot Figure Q.

In the drawings there is illustra-ted a. coinvplete flask l used in themanufacture otl cast iron pipe, the said casting being done with theflask located on the door ot the The tlasl' comprises the lower sectionor drag 2,

ico

and the upper section or cope 3, each of which is substantiallyidentical in forni, the cope being adapted to be superimposed, inreverse relation, upon the drag, after the sand molds have been madetherein, and the core bar 3a, having the sand core thereon,has beenplaced in longitudinal position within the same.

Each flask section is provided with end walls 4 of the form shown(although any other form may be employed), and a plu rality ofintermediate webs 5 spaced substantially equal distances apartthroughout the lengths of the sections, said webs being preferablyformed integrally therewith and serving to strengthen the structure andto hold the sand therein.

The end walls 4 are preferably inclined slightly, as shown in Figure 3,and are pro' vided with a pair of lifting arms or trun* nions 6 at eachend of each section, one of said arms or trunnions being longer than theother to facilitate turning of the section, or inverting the same whilesuspended in the looped ends of lifting cables. rlhis feature is claimedin my pending application, filed August 25, 1924, Serial No. 734,002.

Adapted to be secured to the outer faces of each end wall 4 of the loweror drag section of the flask, is a cast metal bracket or plate 7 formedpreferably of iron and partaking of the shape of the letter W, therebeing two V-shaped branches joined together and provided with anattaching flange 8 located at its lower and inner edge. The flange 3 isprovided with a plurality of bolt openings 8a for the reception of setscrews 8b, which rigidly secure the brackets in position on the outerfaces of the end walls 4.

Each arm of the il-shaped branches is pro vided with an elevated face orpad 10 formed integrally therewith and extending upwardly and inwardlytoward eachother, each face being substantially at an angle of 45 to avertical line through the axis of the core bar 3a, and equidistant fromthe same.. At the outer ends, each bracket 7 is provided with arcuaterecesses 11, which are adapted to rest upon the aforesaid arms ortrunnions 6, the latter being round in cross section, and thusstrengthening the support of the bracket. rlhe brackets 7 may, however,be otherwise held in position on the end walls, as by welding or brazingthe saine, as will be readily understood.

Tapered wedges 12 are adapted to be driven in between the active facesof the pads 1,0 and the adjacent extending ends 13 of the core bar 3a,where the same project through the openings 4a formed in the end walls 4of each of the flask sections, after the said core bar has been appliedin position, in a manner to be explained.

The transverse web 5 next adjacent to the end walls 4 in the upper orcope sections, is

each adapted to support a casting or plate 14 formed to fit transverselywithin the cope, and having the necessary semi-circular openings 15formed in their lower edges to correspond with the openings 5LL ofthewebs, and adapted to receive and accommodate the core bar and core, asclearly shown in Figure 5 of the drawings. rlhe lower outer corners ofthe plate 14 are cut away at an angle, as at 16, to fit against theabutting flanges 17 formed in both the cope and the drag and to thusreceive additional support.

Located substantially over the centers of the openings 15 of the saidplate are vertically disposed slots 18, which are adapted to receive thetap screws or bolts 19 threaded into the adjacent web 5, the slotspermitting oi more readily assembling the plate in position and seatingthe saine uponr the flanges 17, after which the screws are tightened.

Outstanding lugs 20, formed integrally with the plate, extend outwardlyin angular relation to each other and at substantially 450 to the axisof the core bar, said lugs being suitably apertured and threaded for thereception of set screws 21, carrying swivelled heads 22 adapted to bearupon the core bar, when turned inwardly, to hold the same down, and atthe same time prevent any lateral moi/'ement thereof. The wedges 12 actto hold the ends of the core bar up and also prevent any lateralmovement thereof. `When the lower or drag section of the flask isproperly rammed on the molding machine to forni the mold therein andremoved to the casting floor, the core bar 3a with the core alreadyformed thereon, is then positioned iii longitudinal alineinent with thelower lia f of the mold in the dragV and lowered to rest upon the hardpacked sand within the end pockets of the drag between the end walls andthe first webs. The cope with the complementary half of the mold formedtherein is then lowered into position,l the flanges 17 abutting entirelyaround the two members and supporting the weight of the upper section,and the cope and the drag are locked together. The set screws 21 arethen turned to contact tightly with the core bar, which may be readilydone by removing a portion of the sand over the innermost screws whilethe outer screws 21 may be easily reached through openings 23 eventhough said bar be of a larger diameter and sufliciently stiff tosupport its own' weight without sagging. This upward tendency of theintermediate portion is directed against the set screws which constituteabutments 2Q, as indicated in Fig. l and the result is that the outerend portions of the bar where projecting beyond the abutmentsl areforced to act as levers imparting a. downward tendency to the'ends ofthe bar, but this downward tendency is eectively resistedby the wedgesl2, with the result that the bar is'rigidly held throughout its lengthand caused to lie concentric? with they mold, and thus insure a uniformthickness of the wall of the casting.

Where smaller diameter core bars are considered and which might Sag bytheir own weigh-t, dou-ble sets of wedges l2 and double sets ofabutments 22 may be einployed, indicated in Figuresy 2 and l5; it beingreadily understood that the arrangements already described may beduplicated in both the cope and the drag sections for this last-namedpurpose, to counteract both the upward pressure of the incl-tenir'onand.

the downward eife'c't's of saggii'ig, as indicated by the arrows insaidh'gure.-

The heads 22. ofthe set screws are dianieti'ieally opposite the enactingwedges, as

shoi'vn in Fig. e, and. thus the bei'iding action of the is resisted inall directions, and this essential,'inasmuch in pouring the .ioltenmetal in doubie iiaslrs, such as iilustrated in the drawing, the saidmetal. enters in' centrally disposed sprue holes or' gates arranged inlongitudinal* series, one for each pocket between the webs 5,v and thenY J.- -Q gates to passes through laterali-v disposed the molds atdiifferupoints alo their lengths, so that the metal tends to force the core baroutwardly aswell as upwardly.

in Figures l2', 1 3 and l-/i there is shown simple forni of the.invention, wherein the wedges are dispensed witlnvand the sup-k portsare in the roi-'in of two identical plates 2e having semi-circularopenings or seats 25 for receiving andl supporting the ends 13 of thecore bar, said seats' being elevated above the` cut-out portions e ofthe end wall 4 of the lower cr drag section 2. The plates are providedwith vertical slots 26 for the reception of screws 2T entering the endwall, and serving in addition to dowel pins 28 to hold the plate to thesectioinand to support the weight ofthe core bar, the said plates being:further provided with arcuate seats Q9 adapted to rest upon the'aforesaid lugs or' arms 6. I

From the foregoing it will be seen that a simple, strong and durablemeans has been provided for easy attachment to cope and d 'ra-:gsections of pipe molding Llashs or other flasks 4for supporting the corebars in alineinent with thev mold, and to' positively 'prevent themovements thereof incident to the v'elfects of sagging and from thefloating effectsV of the inflowing molten iron, the said means beingarranged in positions so as not to interfere with the placement of thecores the bar adjacent to and spaced from said supports, and wedgesadapted' to be inserted between the ends of the bar and the supports toinsure close contact with tue abutinents and prevent any upward movementof the intermediate portion of the bar and consequent downward movementof the ends thereof.

2. In molding flasks, a core bar having a core thereon, a pair of spacedend supports carried by each end of the drag section of the flask tosupport 'theweight'of the core bar and to prevent any downward andsidewise movement ofl the ends of the same', and a pair of spacedabirtmeins.carried by each endl portion the cope section of the flaskand contacting with the core bar in longitudinal spaced relation to saidsupports to prevent any upward vand sidewise movenient of theintermediate portion of the core bar. v

In means for supporting a core bar in a flaslrfork casting pipe or thelike, outer pairs of supports adapted to bear beneath and on top of thecore bar at the ends thereof,l and inner pairs ofx abutments adapted tobea' heneath and on top of the core bar in spaced relation to thesupports to prevent novemcnt of the-intermediate portion of the core barinany direction, said supports and said abutinents contacting with thecore bar beyond the ends of the core.

4. In means for supporting core bar in a flask for casting pipe or thelike, upper and lower1 supports carried respectively by the copeV anddrag sections of the and located adjacent to the ends of the core hai',wedges interposed between the Asaine and the core bar to bind the saine,and upper and low r abutiuents carried respectively by the cope and dragsections and contacting with the bar adjacent to and between thesupports to prevent movement of thel intermediate portion of the saine.

5. Means for supporting core bars in flasks, comprising' a combinedbottom and side support adjacent to the end thereof, andan abutmentbearing on the top and sides of the bar and spaced at a distan-ee fromthe lower support to constitutea fulcrum when thepressure of the inflo\.fing iron causes the terminal portion of the bar to actas a lever andto prevent side movenient as well as upward movement of the centralportion of the bar.

6. Means for supporting core bars in flasks, comprising combined bottomand side supports located adjacent to the ends of the bar, and abutmentsbearing on the top and sides ofthe bar at a distance from the supportsto constitute fulcrums when the pressure of the inflowing iron causesthe terminal portions of the bar to act as levers and to prevent side orupward movements of the central portion of the bar.

7. Means for sul'iporting a core bar in a flask comprising upper andlower coacting clamping means located near the ends thereof, and upperand lower opposed abutments bearing on the bar in spaced relation tosaid clamping means, the lower abutments acting as fulcrums for thetilting ends of the bar when the central part of the latter tends to sagthrough its weight, such tilting being prevented by the upper clampingmeans.

8. Means for supporting a core bar in a flask comprising upper and lowercoacting clamping means located near the ends thereof, and upper andlower opposed abutments bearing on the bar in .spaced relation to saidclamping means, the lower abutments acting as fulcrums for the tiltingends of the bar when the central part of the latter tends to sag throughits weight, suoli tilting being prevented by the upper clamping means,and the upper abutinents acting as fulcrums for the tilting ends of thebar when the central part of the latter tends to rise from the pressureof the inflowing metal, such tilting being prevented by the lowerclamping means.

9. h/leans for supporting core bars in flasks without the use ofchaplets comprising plates adapted to be secured to the outer faces ofthe end walls of the lower or drag section of the flask, each platehaving opposed faces for the reception of wedges to bear against theundersides of the projecting ends of the core bar and constitutingsupports therefor, other plates adapted to be secured in the upper orcope section of the flask, and adjustable set screws mounted in saidplates and adapted to contact with the upper sides of the core bar inspaced relation to the supports to prevent the intermediate portion ofthe bar from rising by floating on the molten metal.

10. Means for supporting core bars without the use of chapletscomprising brackets adapted to be secured to the ends of existing dragsections of flasks, said brackets having inclined, opposed faces belowand equi-.distant from the axis of the core bar openings in the endwalls, wedges adapted to be driven in between the faces and theprojecting ends of the core bar to support the same, plates adapted tobe secured to one of the transverse webs of existing cope sections offlasks, said plates having inclined, opposed lugs arranged above andequidistant from the axis of the core bar opening in the web, andinclined set screws mounted in the lugs and adapted to bear down on thecore bar adjacent to the supports to resist bending of the core barthrough the action of the incoming metal.

11. Means for supporting, without the use of chaplets, core bars in pipeflasks, composed of lower or drag sections and upper or cope sections,said means .comprising brackets adapted to be secured to the outer facesof the end walls of the drag sections and having a pair of inclined padsor i* faces arranged at an angle of substantially 450 to the axis of thecore bar and below 'the same, other brackets adapted to be transverselysecured in the cope sections in spaced relation to the pads or faces andhaving i11- clined lugs provided with adjustable set screws arranged atan angle of substantially 45o to the axis of the core bar and adapted tobear down on the same, and wedges adapted to be driven in between saidpads or faces and the core bar in opposition to the set screwstoprevent'vertical or lateral movement of the bars.

12. Means for supporting, without the use of chaplets, core bars in pipeflasks, composed of lower or drag sections and upper` or cope sections,said mea-ns comprising brackets adapted to be secured to the outer facesof the end walls of the drag sections and having a pair. of inclinedpads or faces arranged at an angle to the axis of the core bar and belowthe same, and wedges adapted to be driven in between said pads or facesand the core bar to prevent vertical or lateral movement of the bar.

13. Means for supporting core bars in flasks without the use of chapletscomprising brackets transversely mounted in the cope section and havinginclined lugs, and set screwsmounted in said lugs at an angle to theaxis ofthe core bar and adapted to bear on the same.

14. Means for supporting core bars in flasks without the use of chapletscomprising brackets transversely mounted in the cope section and havinginclined lugs, some of said lugs being larger than others, and setscrews mounted in said lugs at an angle to the axis of the core bar andadapted to bear on the saine.

15. Means for supporting core bars in pipe flasks without the use ofchaplets, comprising a plate mounted on one section of the flask andhaving substantially semi-circular openings or seats at the inner edgewhere the flask section joins with the other section of the flask, andmeans for adjustably mountlGO ing said plate to the end wall of saidflask flasks without the use of chaplets, comprising a plate mounted onone section of the flask and having seats at the inner edge where oneflask section joins with the other flask section, said seats supportingthe eX- tended end of the core bar and resisting downward movement ofthe saine, and other seats provided on the plate and engaging with thelifting` trunnions of the flask.

17. In means for supporting` core bars in flask sections, wedge seatscarried on the outer faces of the ends of the drag, said Seats being`arranged at opposite angles beneath and in spaced relation to the corebar, wedges adapted to he driven inwardly and downwardly between theseats and the core bar t0 support and prevent side movement of the core.Y

18. In means for supporting corebars in flask sections,wedge seatscarried on the outer faces of the ends of the dra-g, saidV seats being`arranged at opposite angles beneath and in spaced relation to the corebar, wedges adapted to he driven inwardlyand downwardly between theseats and the core har to support and prevent side movement of the core,inclined lugs carried by the cope in spaced relation to the ends thereofand in spaced relation to the core bar, and set screws threaded throughthe lugs and directed inwardly and downwardly at opposite angles to hearon the core bar and hold same down upon the supporting wedges andprevent side movement thereof.

In testimony, that I claim the foregoing,l as my own, I have heretoahixed my signature.

JAMES R. MCWANE.

